12-letter words that end in x
- plano-convex — pertaining to or noting a lens that is plane on one side and convex on the other.
- pneumothorax — the presence of air or gas in the pleural cavity.
- polar vortex — a whirling mass of very cold air that sits over the North or South Pole: A displaced polar vortex is causing Arctic temperatures across the United States.
- prices index — an official list of the price of goods
- property tax — a tax levied on real or personal property.
- protosynthex — A query system for English text.
- purchase tax — a sales tax on nonessential and luxury goods.
- radiant flux — the time rate of flow of radiant energy.
- rubber latex — the milky sap of any of several trees of the genus Hevea, especially H. brasiliensis, from which natural rubber is derived.
- shooting box — a small house or lodge for use during the shooting season.
- six-yard box — On a football pitch, the six-yard box is the rectangular area marked in front of the goal.
- skelic index — the ratio of the length of the leg to the length of the torso of a person, multiplied by 100.
- spinning box — centrifugal box.
- stuffing box — a device for preventing leakage of gases or liquids along a moving rod or shaft at the point at which it leaves a cylinder, tank, ship hull, etc.
- the fair sex — women collectively
- transfer box — A transfer box is a gear system that divides the power between the front and rear axles of a four-wheel drive system.
- transfer tax — a transaction fee imposed on the transfer of title to property
- tumbling box — a box, pivoted at two corners, used in the manner of a tumbling barrel.
- twin paradox — a phenomenon predicted by relativity. One of a pair of identical twins is supposed to live normally in an inertial system whilst the other is accelerated to a high speed in a spaceship, travels for a long time, and finally returns to rest beside his twin. The travelled twin will be found to be younger than his brother
- windfall tax — a tax levied on an organization considered to have made excessive profits, esp a privatized utility company that has exploited a monopoly